I'm not entirely certain about the PS3, but I know the PSP has a whole bunch of ways to keep people from hacking its games. For instance, each game encrypts its save, and each game's encryption is different. One would have to spend a very long time just to learn how to hack one game, and that knowledge would be useless when trying to hack other games.
Since the PS3 is made using the same general software the PSP uses, I assume it has similar measures in place (I'm pretty sure it does). In other words, I don't think you'll find anybody who can hack it, even if they wanted to. Sorry, friend.